Huang Guanghua, Chen Zening, Pan Zhidong, Xu Yan, Hu Hanlin, Wang Yanmin
Postdoctoral Innovation Practice Base of Hoffman Institute of Advanced Materials, Shenzhen Polytechnic, Shenzhen 518055, China.
School of Materials Science and Engineering, South China University of Technology, Guangzhou 510640, China.
Materials (Basel). 2023 Mar 23;16(7):2558. doi: 10.3390/ma16072558.
Submicron-sized quasi-spherical zinc oxide (ZnO) particles were prepared by wet ultrafine grinding in a stirred media mill under various conditions. The effects of parameters (i.e., solution type, acid or alkali concentration, solid content and grinding time) on the particle median size (d), particle size distribution (PSD) and sphericity of ZnO particles was investigated. The results show that submicron-sized quasi-spherical particles (i.e., d: 370 nm, uniformity coefficient () of 2.28 and sphericity of 0.91) can be obtained when the micron-sized ZnO particles are ground for 30 min in a CHCOOH solution at a concentration of 0.010 mol/L with 20 wt.% of solid content. The chemical dissolution of ZnO particles ground in the presence and absence of acetic acid is discussed. It is indicated that chemical dissolution accelerated due to the mechanochemical effects could reduce the particle size, obtain a narrower PSD and enhance the sphericity. In addition, the functions of selection and breakage were used to analyze the grinding mechanism of ZnO particles.
在搅拌介质磨中，通过湿法超细研磨在各种条件下制备了亚微米级的准球形氧化锌（ZnO）颗粒。研究了参数（即溶液类型、酸或碱浓度、固含量和研磨时间）对ZnO颗粒的颗粒中值尺寸（d）、粒度分布（PSD）和球形度的影响。结果表明，当微米级ZnO颗粒在浓度为0.010 mol/L、固含量为20 wt.%的CHCOOH溶液中研磨30分钟时，可以获得亚微米级的准球形颗粒（即d：370 nm，均匀系数为2.28，球形度为0.91）。讨论了在有和没有乙酸存在的情况下研磨的ZnO颗粒的化学溶解情况。结果表明，由于机械化学效应而加速的化学溶解可以减小颗粒尺寸，获得更窄的PSD并提高球形度。此外，使用选择和破碎功能来分析ZnO颗粒的研磨机理。
